Paper-bag machine



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vAQLSTBVEBIS. PAPER BAG MACHINE.

No. 461,287.. Patented Oct. 13, 1891.

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.(No Model.) 5 Sheets-Sheet 4.

A. L. STEVENS. PAPER BAG MACHINE.

" Patented Oct. 13,1891.

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A. L. STEVENS; PAPER BAG MACHINE.

N0. 461,287. Patented Oct. 13,1891.

'UM-TED STATES PATENT 7Orr1ci3'.v

ARTHUR L. STEVENS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE DIAMOND PAPER BAG COMPANY, OF VILMINGTON, DELAVARE.

PAPER-BAG MACHIN E.

SPECIFICATION foimingipart Of Letters Patent No. 461,287, dated. October 13, 1891.

Application liled July 10, 1890. i Serial No. 358,304. (No model.) i'

To aZZ whom l? may concern:

Be it known that I, ARTHUR L. STEVENS, a citizen of the' United States, residing in the city and county *of Philadelphia, and State of Pennsylvania. have invented certain new and useful Improvements in Paper-Bag Machines, of which the following is a specification.

My invention relates to that class of machines in which a strip of paper is conducted to from a roll past appliances for folding or forming it to make paper bags or envelopes, and

more especially lor the manufacture of paper bags; and my invention consists in means for insuring the rapid and positive feed of the paper without detrimental strains for maintaining it in its true course and for folding -it in the manufacture of paper bags, as fully set forth hereinafter, and as illustrated in the accompanying drawings, in whichzo Figure l is a side elevation of sufficient of a paper-bag-making machine to illustrate my improvements, the folding-blades and connections being removed. Fig. 2 is an elevation,

in part section, illustrating more especially z5 the folding-blades and connections. Fig. 3 is 'a plan of Fig. 2. Fig. 4 is a rear elevation of the machine. Fig. 5 is an elevation of part of the machine on the line 5 5, Fig. l. Fig. 6 is an enlarged transverse section on thclne 6 G, Fig. 2. Fig. 7 is a transverse section on the line 7 7, Fig. 2. Fig. 7, looking in the direction of the arrow ct. Fig. 9 is an edge view of Fig. 7, looking in the direction of the arrowb. Fig. 10 is a plan of 3 5 one of the folding-fingers and connections. Fig. ll is a part of one of the folding-lingers detached. Fig. l2 is a section on the line l2 l2, Fig. l0. Fig. 13 is a side view of one of the flanged guide-rings of the feed-roller. Fig. 14 is an edge View of one of said rings. Fig. l5 is a detached view of one of the foldingblades and carrier.

Inasmuch as my invention relates to those parts of a paper-bag machine that operate to deliver the paper from the roll and guide and fold the sameand to facilitate the changes necessary to form bag-tubes of different sizes, I shall describe only these portions for effecting these results, making no reference to the 5o devices for severing the tube transversely or for pasting and folding the ends to make the Fig. 8 is an edge View off ends of the bag, as these features 'may be of any suitable construction-as, for instance, the construction'illustrated in Letters Patent No. 415,950, granted to me November 26,1889. 5'5 The frame portion of the machine may be constructed in any suitable manner to support the parts hereinafter described, but as lpreferred and shown it consists of two main end portions A A and two parallel separated 6o rods l l, carried at their extremities by and connecting said end portions, the rods being of such construction that the intermediate folding and creasing mechanism supported thereby and hereinafter described may be readily adjusted lengthwise upon the bars, as required, and access may at all times be had to said mechanism from all sides, as desired. The end portion Aof the frame has bearings for a horizontal transverse shaft 2, supporting 7o a roller 3, having flanges 4 4, suflieiently separated to receive between them the rollX of paper, which bears directly upon the roller 3, and is supported by a transverse shaft 5, the ends of which extend into vertical grooves 6 6 in 75 the side pieces of the frame, so as to permit the shaft'to descend as the diameter of the:

`roll X decreases.

The roller 3 is positively driven at the speed that it is desired to impart to the paper by 8o any suitable driving mechanism, so that the paper is positively fed, and to prevent any fracture of the paper in one case or buckling or creasing in the other the feed-rolls 7 8 are geared with the roller 3, so as to travel at exactly the same surface speed as the latter, whereby the paper Ais drawn over the usual former I at the same speed with which'it is fed at the rear of the machine. By thus imparting a positive movement to the paper- 9o roll I remove all strain upon the paper in feeding, and am therefore enabled to avoid limiting the speed of the operations by the strength of the paper, so that I am enabled to make bags with great rapidity from paper 9i; that is too fragile to be drawn rapidly through machines by the action of the feeding-rolls y only.

One means of connecting and driving the feed-rolls and the roller 3 is shown in the drawings, Figs. l and 4, the same consisting in gearing the lower feed-roll 8 with the roller IOO feet, the friction between the paper andthe r'ller 3 being such that whatever may be the speed at which the roll X rotates it cannot be carried by momentum so as to feed out the paper any faster than the speed of the roller 3. The paper-roll and the feed-roll 3 are in contact at the .point where the paper leaves the feed-roll, thereby holding the paper tight upon the whole surface of the paperroll untilit passes from it. Further, as the paper is taken from the roll at the point where the feed-roll bears, said paper is prevented from moving laterally on the roll before leaving it and is thus guided straight t0 the machine. 1

In order to center the roll X of paper upon the shaft 5, so that4 the axis of the roll will be coincident with that of the shaft, and, further, to secure the roll in properposition longitudinally upon the shaft, I make use of two conical centering hubs -16 16, each movable upon the shaft and secured by a setscrew 17, the conical end entering the axial opening of the roll.

It frequently happens that the paper for some reason passes unevenly from the roll X toward the folding devices, one edge being tighter than the other or having more slack than the other, whereby the paper is caused to pass unevenly to the folding devices, to obviate which I make use of a movable takeup or dandy roll 18, round which the paper passes on its way to the folding devices, which dandy-roll is supported at each 'end independently upon yielding bearings and serves to take up the slack sideof the paper, and thereby guide it straightv toward the folding devices. Thus the roll 1S turns in bearings in the side arms of a rocking frame C, consisting of said arms and a rock-shaft 19, turning -in bearings secured to the frame of a machine, springs 20 being connected to the inner ends of said arms and also adjustably connected to bearings 21 upon the frame, so that they may be tightened or slackened to any` desired extent to increase or decrease the pressure of the roller upon the paper.

' In the construction shown the paper passes from the dandy-roll 13 over an upper guide interposed between the trough 24 and an in dependent bearing-arm 28, serves to lift the trough and maintain the pasting-disk in yielding contact with the paper, and by adjusting the arm vertically the tension of the spring may be varied as desired. By this means I insure the application of the paste evenly and uniformly to the edge of the paper with comparatively little friction.

As the paper will vary in width according to the| sizes of the bags, the parts described are adjustable accordingly. Thus the flanges 44 of the roller 3 are formed upon split rings 29, Figs. 13 and 14, each adapted to receive the roller and provided with a screw 30, by

means of which the ring may be contracted upon the roller to hold it in place or expanded and loosened for adjustment. The conical hubs 16 in like manner can be set to any desired position upon the shaft 5 after loosening the set-screw 17 and may thereafter be secured, and the trough 24 may be set to-any desired position upon the rod 26,the bearingarm 28 being adjustable upon said rod and secured after adjustment by means of the binding-screw 31. The body or cylinder of the roller 3 turns loosely7 on its shaft 2 and is clamped thereto by a clamp ot, Figs. 4 and 5, secured to the end of the roll-cylinder and split, with a screw l) passing through the split side, so as to contract the clamp on the shaft or loosen it. This permits the rollto be loosened to pull the paper through the machine, while the other parts, including the shaft 2, are stationary. p

The former I consists of two parallel blad es 32 33, securedupon opposite sides of a barv strip turning upward and'passing between l two vertical blades 38 38, as best shown in Figs. 2 and 3, and 'an oblique blade 40 turns down the unpasted side of the strip flat upon the former, and another oblique blade 40, set in advance of the iirst blade 40 and upon the opposite side, then turns down the adjacent IOO IIC

pasted side of the strip upon that already turned in and presses the pasted edgeagainst v the face of` the paper beneath it. To adapt these parts to bags of different sizes without the nice adjustments heretofore essential whenever such changes are made, and, fury ther, to secure ready access to all parts of` the folded strip at any time, as well as other advantages connected with the adjustment and operation of the machine, I make use of through the space afforded by contracting the diameter of the feeding-roller 7, as shown in Fig. 3. Each of the bellows folding-blades 35, instead of being bolted to a stationary part of the frame, as heretofore, is connected to a carrier-bar 41, having ears through which pass pins 42, connecting said harto bell-crank levers 43, that swing upon brackets 44, carried by the rods l, the other arms of the bellcrank levers being connected by a rod 45. The parts are constructed as best shown in Fig. 6, so that by moving longitudinally either of the rods 45 the .levers vmay be swung to move the carrier-bar 4l to or from the former to any desired extent, preserving the parallelism of theparts, so that when a change has to be made the carrier-bar may be swung back, disconnected from the levers 43 by removing the pins 42, and another carrier-bar with a blade of different width may be` oonnected to the levers and swung into position without any other adjustment than is necessary to take out and reinsert the pins. To secure the parts in place after adjustment the levers 43 may swing upon the screw-pins 46, provided with hand-wheels 47 and with flanges 4S, between which and the brackets 44 the levers may be clamped. The brackets 44 are preferably provided with split sockets for the reception of the bars ll of the frame, and clamping-bolts 49 serve as a means of securing the brackets adjustably upon said bars, so that they may be moved lengthwise thereon, as desired.

It is necessary to change the blades 40 or remove them when the paper is iirst inserted in the machine, and to do this eifectually and readily without repeated nice adjustments each blade is provided with a slot @enlarged at the inner end and adapted to the enlarged portion of the pin 50, the contracted end of which fits a recess w in one ot' the carriers 4l. By drawing the pin outward slightly the contracted portion of the slot in the blade may be passed along the contracted end of the pin. When the enlarged portion of the slot is in position, the pin may be pushed in to secure the blade in place. The necessary vertical movements of the pin may be secured without detaching it, and the pinmay be retained in place by means of a Hat forked spring 5l, the prongs of which enter-an an` nular groove in the pin, as best shown in Figs. l0 and 12.

In order to overcome the tendency of the overlapped pasted portion of the tube to spread or separate before the paste has dried and to draw them together should they be pasted when partly separated, I make use of two drawing-rollers 53 53, each set at an angle to bear upon the top of one side of the folded strip and to be revolved by contact therewith, thereby tending to draw each side inward and hold the same in position until the tube passes between the feed-rolls.

permit these rollers to be adjusted to any desired angle each is carried by a yoke 54, centrally clamped by ascrew-pin 55 to across-bar 56, carriedV by an arm projecting from a frame 57, carried by the rods l l of the main frame. The pressure of the rollers 53 upon the paper may be regulated by means of the screw 58, bearing upon the spring-arm (il, that carries the cross-bar 56, and to carry the rollers out of the way when the former I has to be changed I hinge the frame 57 so as to swing to one side. Thus one end of the frame is pivoted to a bracket 59, adjustable upon one of the bars l l, while the other end of the frame has a socket and spring-iinger 60 for clutching the adjacent bar l, as best shown in Fig. 7.

It will be seen that each carrierbar 4l presents an edge fu, Figs. 3 and 6, both below and above the blade 35, which edges serve as guide-ed ges to determine the exact extent to which the blade shall be inserted into the side channels of the former, and also' aid in guiding the paper as it travels along the former at the edge of both blades thereof.

It will be evidentthat any other desired `parallel motion than the connected levers 43 may be employed for facilitating the adjustment of the carrier and guiding-bars and their blades.

The blades 40 may be of any desired shape, but I prefer to make them substantially triangular-that is, tapering from a point where the paper first meets the same toward the butt-ends, and then,if desired, continuing for aportion of the length of uniform width'. This insures a gradually folding in of the paper that permits it to beoperated upon with great'rapidity without danger of fracture.

WVithout limiting myself to the precise construction andy arrangement of parts shown and described, I claiml 1. A paper-bag machine in which the folding-blades are supported adjustably upon an open frame having forits sides two parallel bars adjacent to the forlner, whereby free access may be had to said parts at all sides, substantially as described.

2. The combination, with the shaft of the paper-roll supported to move vertically, of a roller arranged to support Ythe paper-roll and means for imparting a positive movement to said roller, the two rolls being in contact at the point where the lpaper passes from the paper-roll, substantially as set forth.

3. The combination, with the-paper-roll andits shaft movable in vertical guides and with the feed-rolls 7 8, of a driven roller 3, supporting the paper-roll at the point where the paper leaves the latter, the axes of the paperroll and driven roller being in the same vertical plane, and connections between the driven roller and one of said feed-rolls, whereby they are driven simultaneously at the same speed, substantially as set forth.

4. The combination, with the devices for supporting and feeding the paper-roll and with the feed rollers, of an intermediate dandy-roll having an independent support at each end, and adjustable appliances for vary- IOO IIO

.ing the pressure of the roll against the papel at each end, substantially as set forth.

5. The combination, with a support for the traveling` strip of paper, of a paste-trough carrying a pasting-disk, an independent arm 2S, an intermediate spring 27, and supports upon which the arm and trough are independently adjustable, substantially as and for the purpose set forth.

6. The combination, with the rocking pastetrough and its disk, of a supporting-rod 2G, extending through arms upon the trough and upon which rod the trough is pivoted, an independent arm 2S, and la spring interposed between the arm and the trough, the arm being adjustable to vary the tension of said spring, substantially as described.

7. The combination, with the former having side channels, of folding-blades and carrying-bars therefor, said bars arranged to form guiding-edges opposite and immediately adjacent to the edges of the blades of the former, substantially as set forth.

8. The combination, with the former having side channels, of folding-blades and carrying-bars therefor, constructed to form guiding-edges o above and below the blades and adjustably supported to move to and from the edges of the former parallel therewith, for the purpose described.

9. The combination, with the foldingblades, of bell-crank pi voted ad j Listing-levers, connecting-rod 45, and means for securing the parts after adjustment, substantially .as set forth.

10. The combination,with the former, foldingblades, and pivoted levers, of a support for said levers and a fastening for securing the levers, in different positions, substantially as described.

11. The combination, with the former and folding-blades extending between the blades of said former, of pivoted levers connected to said folding-blades, and the support for each lever movable longitudinally7 on a support upon the frame, substantially as set forth.

12. The combination, with the former, of

the parallel side bars l 1 of the frame and folding-blades and levers connected therewith and supported ad justably bv Said bars, substantially as described.

13. The finger Ll-O,provided with the slot. x, in combination with securing-piu and actuating-spring 51, substantially as setforth.

14. The combination, with theformer and the drawing-rolls, of a support overhanging the former and means for adj nsting each roll vertically and horizontally upon said support, substantially as specified.

15. The combination, with the stationary former, of a support overhanging the former, inclined rolls 53, carried by the support, and means for varying the pressure of the rolls 53 upon the former,substantially as set forth.

16. The combination, with the former and with the rolls 53,'of a movable frame 57,sup porting said rolls, substantially as described.

17. The combination, with the former, of

the vertically-Swingin g frame 57, and the rolls 58, adjustably supported to be set at different angles upon said frame, substantially as described. I 4

18. The combination, with the former and the rolls 53, of a frame supporting said rolls, pivoted at one side and provided with a clamping device at the opposite'side,substantially as described. A 19. The combination, with the parallel bars 1 1, of a swinging frame 57, adjustably connected with said bars and supporting the rollers 53, substantially as described.

20. The combination, with the frame 57, of a spring-blade connected with said frame, and rollers 53, supported by said blade and adjustable at different angles thereto, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARTHUR L. STEVENS. 

